Re: F250 460 engine change
Emissions. Or for a better term Computer tech. In 1995 OBD came out with a raft of emissions components and an older engine (pre 95) won't be compatible to run on a newer wiring harness let alone pass current emission standards.
The blocks are the same, but to utilize the older engine you'll have to use the old wiring harness and computer (or lack there of), leaving your newer truck with multiple engine lights and the like to deal with. In some states it's required that no engine lights be on in order to pass safety inspection either, which is why some shops will tell you flat out to stay away.
For other results check out RockAuto Auto Parts
or Car-Part.com--Used Auto Parts Market
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!